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Finding the Fourth Proportional to 201.09, 301.49 and 135.91

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Solution

The fourth proportional to 201.09, 301.49 and 135.91 is: 203.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.09 : 301.49 = 135.91 : x
  2. Step 2: Convert to fraction form
    201.09/301.49 = 135.91/x
  3. Step 3: Cross multiply
    201.09x = 301.49 × 135.91
  4. Step 4: Simplify right side
    201.09x = 40,973.32
  5. Step 5: Solve for x
    x = 40,973.32/201.09
  6. Step 6: Final answer
    x = 203.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.